Driving-gear especially for groups of rolls



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1,397,893, Patented Nov. 22, 1921.

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HARRY KAY, OF BURY, ENGLAND.

DRIVING-GEAR ESPECIALLY FOR GROUPS OF ROLLS.

Specification of Letters Patent.

Patented Nov. 22, 1921..

Application filed October 12, 1920. Serial No. 416,363.

To all whom it may concern:

Be it known that I, HARRY KAY, subject of the King of Great Britain, residin in Bury, in the county of Lancaster and Kingdom of England, have invented certain new and useful Improvements in Driving-Gears Especially for Groups of Rolls, of which the following is a specification.

The present invention relates to improvements in driving gear for paper making machinery, bleaching machinery or other machinery in which it is necessary to drive uniformly a train of upper and lower rolls. The invention particularly relates to the trains of upper and lower rolls employed for drying paper. In a usual arrangement of such rolls, the upper and lower rolls are staggered and are provided with gear wheels so that each intermediate gear wheel is in mesh with two others, i. e. the first lower gear wheel is in mesh with the first upper gear wheel which meshes with the second lower gear wheel and this connection is maintained to the second upper gear wheel, the third lower gear wheel, and so on. Thus the whole train of both upper and lower gear wheels is in mesh and can be driven by a pinion. In another arrangement of such rolls, each upper roll is disposed vertically over the corresponding lower rolls and it will be seen that in this arrangement it is not possible to gear the whole of the gear wheels together and it has therefore been customary to provide gear wheels which mesh vertically so that the first upper gear wheel meshes with the first lower gear wheel and a series of driving pinions are then provided; one pinion is necessary for each pair of wheels so that the whole train can be driven by a single source of power.

The object of the present invention is to provide a simpler and more eflicient driving mechanism for trains of rolls of the second type in which each roll is disposed vertically above the corresponding lower roll. A further object of the invention is to provide means enabling an auxiliary motor to assist in starting aheavy train of rolls of the above kind and a further object is to provide means whereby this auxiliary motor can be readily out out. A further object is to provide an arrangement in which driving pinions can be interpolated at any desired point and operated as idler pinions when not required. Further objects of the invention are to eliminate carrier pinions, to diminish vibration, to diminish the power required and to lessen the risk of breaking gears owing to the expansion of heat, and

further to employ direct drive from the motor.

The invention will be described by way of example in the accompanying drawings in which Figure 1 is a diagrammatic elevation of a small portion of a paper making machine having rolls driven according to the present invention,

Fig. 2 is a partial plan view showing the lower series of gear wheels.

In these drawings, A A A and A are usual upper rolls mounted on spindles C and B B B and 13* are the usual lower rolls, mounted on spindles D. 5 is the paper which is guided over the rolls in the usual manner.

According to this invention it will be seen that the gear wheels E E E and E cor responding to the lower train of rolls are arranged in staggered manner so that each successive gear wheel is slightly displaced longitudinally of the roll with respect to the succeeding gear wheel. F,, F F and F are the upper gear wheels which are similarly arranged. It will be noted that each upper gear wheel is displaced longitudinally with respect to the corresponding lower wheel 6. g. F and E Hence each gear wheel of the lower series intermeshes diagonally with the adjacent gear wheels of the upper series, and not with the corresponding gear wheel vertically above it. The diameter of the gear wheels is greater than would be the case it. they were arranged to intermesh horizontally or vertically in view of the fact that according to this invention they are so arranged as to intermesh diagonally.

The gear wheels are driven by a double width pinion G and a motor H. K is an auxiliary motor which can be cut out after the gears have been put into motion; this auxiliary motor drives the double width pinion for the purpose of overcoming the heavy starting torque. The auxiliary motor may also be used as a spare to replace motor H when this is under repair. Other driving mechanism may be provided if it is common to both series of wheels.

It will be seen that owing to this diagonal system of intermeshing, the arrangement according to the present invention has the adings.

vantage of making it possible to work on the system in which the upper rolls are disposed vertically over the lower rolls while overcoming the difiiculties of drive which have hitherto been associated with this system.

--The arrangement is particularly advantageous for high speed operation'and it will be realized that as the combined weight of-the rolls in a paper making machine maybe over 100 tons, it is necessary to find a very uniform and reliable type of driving mechanism. This is provided by the common driving mechanism, 0. g. the double width pinions. Owing to the large diameter gear wheels, it is readily possible to employ direct drive from the motor. The double width pinions have a longer life and there is less wear thereof because of the shorter train of gear wheels. As the gears mesh diagonally and not vertically, there is less disturbance owing to any slight wear which may take place to one or more of the roller bear- Further advantages are the diminished vibration, the less power required, the less risk of breakage and the elimination of carrier pinions.

I declare that what I claim is 1. Driving mechanism for a train composed of upper and lower rolls comprising a series of upper rolls each of which is situated vertically above the corresponding member of a series of lower rolls, and driving means therefor comprising a plurality of series of gear wheels in which each member of the same series meshes diagonally with the adjacent members of the other series and is longitudinally displaced with respect to the adjacent members of the same series.

2. Driving mechanism for a train composed of upper and lower rolls comprising a first upper roll vertically placed over a first lower roll, a second upper roll vertically placed over a second lower roll, and driving means for said rolls including a first upper gear wheel, a second lower .gear :wheel meshing diagonally with the first upper gear wheel, asecond upper gear wheel longitudinally displaced with respect to the first upper gear wheel, a first lower gear wheel longitudinallv displaced to the second lower gear wheel and meshing diagonally with the second upper gear wheel. 1

3. Driving mechanism for a train com posed of upper and lower rolls comprising a series of upper rolls each of which is situated vertically above the corresponding member of a series of lower rolls and driving means for said rolls including a plurality of series of gear wheels in which each member of the same series meshes diagonally with the adjacent members of the other series and 1s longitudinally displaced with respect to the adjacent members of the same series and a double width pinion adapted -to engage simultaneously one gear wheel of each series.

4. Driving mechanism fora train composed of upperand lower rolls comprising a first upper roll vertically placed over a first lower roll, a second upper roll vertically placed over a second lower roll, and driving -means for said-roll including a first upper gear wheel a second lower gear wheel meshing diagonally with the first upper gear wheel, a second upper gear wheel longitudinally displaced with respect to the first upper gear wheel,'a first lower gear wheel longitudinally displaced to the second lower gear wheel and meshing diagonally with the second upper gear wheel, and a double width pinion adapted to engage simultaneously a pair of such gear wheels.

5. Driving mechanism for upper and lower rolls comprising a series of upper rolls each of which is situated vertically over the corresponding member of a series of lower rolls and driving means for said rolls comprising a plurality of series of gear wheels in which each member of the same series meshes diagonally with the adjacent members of the other series and is longitudinally displaced with respect to the adjacent members of the same series, a double width driving pinion adapted to engage simultaneously one gear wheel of each series and another double width pinion adapted to engage one gear wheel of each series and actuated by an auxiliary motor.

6. Driving mechanism for a group of up per and lower rolls comprising a plurality of series of gear wheels adapted to drive said rolls and so arranged that wheels of each series mesh diagonally with each other and means for simultaneously driving both series by the same operating member.

7. Driving mechanism for a group of upper and lower rolls comprising two independent series of gear wheels adapted to drive said rolls wherein the members of each series are interconnected and common means for simultaneously driving both series.

8. A driving mechanism for paper machines having driving wheels in which said driving wheels for individual rolls or the like are divided into a number of groups the elements of which lie in parallel planes and are interconnected one with the other, while one of each-group is simultaneously driven from a common driving element of a width equal to the width of both the groups.

In witness whereof, I have hereunto signed my name this 10th day of August 1920, in the presence of two subscribing witnesses.

HARRY KAY.

Witnesses:

WVILLIAM ADAMSON,

JUsrIN WAR URTON. 

